江苏大学学报（自然科学版）2017，Vol.38Issue(6)：682-686,695,6.DOI:10.3969/j.issn.1671-7775.2017.06.011
基于双阻抗匹配的宽带Doherty功率放大器设计
Design of wideband Doherty power amplifier based on two impedance matching network
摘要
Abstract
To meet the design requirements of high-efficiency and broadband of power amplifiers in wireless communication systems employing modulation signals with high peak to average power ratio (PAPR),an improved Doherty power amplifier (DPA) was investigated.To achieve the impedance transformations both in low power region and at saturation,a two impedance matching network design was proposed to simulate and design the main and auxiliary output matching networks,which could simplify the load modulation network of DPA and extend the bandwidth.The wideband DPA with 2.30 ～2.80 GHz was designed and measured,and the proposed method availability was verified.The results show that the designed DPA has the gain fluctuation less than 2 dB and the saturated output power more than 43.5 dBm over the frequency band of 2.30 ～ 2.80 GHz,while the saturated efficiency is from 66％ to 71％ with 6 dB back-off efficiency from 48％ to 59％.The designed wideband DPA can satisfy the efficiency requirement of future wireless communication systems employing modulation signals with high PAPR.关键词
Doherty功率放大器/双阻抗匹配网络/宽带/高效率/功率回退Key words
Doherty power amplifier/two impedance matching network/wideband/high efficiency/back-off power分类
信息技术与安全科学引用本文复制引用
孔娃,夏景..基于双阻抗匹配的宽带Doherty功率放大器设计[J].江苏大学学报（自然科学版）,2017,38(6):682-686,695,6.基金项目
江苏省自然科学基金资助项目(BK20150528) （BK20150528）
江苏省高校自然科学基金资助项目(15KJB510007) （15KJB510007）
江苏大学高级人才科研启动基金资助项目(15JDG080) （15JDG080）
